Lenovo NeXtScale n1200, Installation And Service Manual

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DANGER
Electrical current from power, telephone, and communication cables is hazardous.
To avoid a shock hazard:
• Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration
of this product during an electrical storm.
• Connect all power cords to a properly wired and grounded power source.
• Connect to properly wired power sources any equipment that will be attached to this product.
• When possible, use one hand only to connect or disconnect signal cables.
• Never turn on any equipment when there is evidence of fire, water, or structural damage.
• Disconnect the attached ac power cords, dc power sources, network connections,
telecommunications systems, and serial cables before you open the device covers, unless you
are instructed otherwise in the installation and configuration procedures.
• Connect and disconnect cables as described in the following table when you install, move, or
open covers on this product or attached devices.
To Connect: To Disconnect:
1. Turn OFF all power sources and equipment that is to
be attached to this product.
2. Attach signal cables to the product.
3. Attach power cords to the product.
• For ac systems, use appliance inlets.
• For dc systems, ensure correct polarity of -48 V dc
connections: RTN is + and -48 V dc is -. Earth
ground should use a two-hole lug for safety.
4. Attach signal cables to other devices.
5. Connect power cords to their sources.
6. Turn ON all the power sources.
1. Turn OFF all power sources and equipment that is to
be attached to this product.
• For ac systems, remove all power cords from the
chassis power receptacles or interrupt power at
the ac power distribution unit.
• For dc systems, disconnect dc power sources at
the breaker panel or by turning off the power
source. Then, remove the dc cables.
2. Remove the signal cables from the connectors.
3. Remove all cables from the devices.
Statement 34
CAUTION:
To reduce the risk of electric shock or energy hazards:
• This equipment must be installed by trained service personnel in a restricted-access location, as
defined by the NEC and IEC 60950-1, First Edition, The Standard for Safety of Information
Technology Equipment.
• Connect the equipment to a properly grounded safety extra low voltage (SELV) source. A SELV
source is a secondary circuit that is designed so that normal and single fault conditions do not
cause the voltages to exceed a safe level (60 V direct current).
• Incorporate a readily available approved and rated disconnect device in the field wiring.
• See the specifications in the product documentation for the required circuit-breaker rating for
branch circuit overcurrent protection.
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